The vsscanf function is the same as the sscanf function except
    that instead of being called with a variable number of arguments,
    it is called with an argument list that has been initialized by
    va_start (and possibly with subsequent va_arg calls).

    The vsscanf function is also equivalent to the vfscanf function,
    except that the first argument specifies a wide-character string
    rather than a stream. Reaching the end of the wide-character
    string is the same as encountering EOF for the vfscanf function.

    For more information about format and conversion specifications
    and their corresponding arguments, see the "Understanding Input
    and Output" chapter of the HP C RTL Reference Manual.

    See also vsscanf and sscanf.